Protective case for a watch



FIG. 1 is a right, top and front perspective view of a protective case for a watch showing the subject design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a left, bottom and rear perspective view thereof. 

CLAIM The ornamental design for a “protective case for a watch,” as shown and described. 